Improvement in machines for carving, polishing



2 Sheets--Sheet 1.

R. T. SMITH. improvement in Machine for Carving, Polishing, &c. No. 132,928, Patented Nov.l2 ,l872.

m s Y AM. PHOYO-LITHGGRAPHIG COJV. PI (USBOBNES FfiOl-ESSJ 2 Sheets-- Sheet 2.

R. T. SMITH.

Improvement in Machine for Carving, Polishing, 8L0.

Patented Nov. 12, 1872.

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TATES ROSWELL T. SMITH, OF NASHUA, NEW HAMPSHIRE.

IMPROVEMENT IN MACHINES FOR CARVING, POLISHING, &c.

Specification forming part of Letters Patent No. 132,928, dated November 12, 1872.

To all whom it may concern:

Be it known that I, RoswELL T. SMITH, of Nashua, in the county of Hillsborough and State of New Hampshire, have invented a new and useful Machine for Carving, Polishing, Grinding, and other like purposes; and I do hereby declare that the following is a full,

, clear, and exact description thereof, reference being had to the accompanying drawing making part of this specification, in which- Figure 1, Plate 1, is a perspective view of the machine having a circular cutter applied to it. Fig. 2 shows in section a burring-tool applied on the cutter-shaft. Fig. 3 is a section through a centering device and guide for cutting parallel lines. Fig. 4 is a sectional view, showing an auxiliary handle applied to the handle on the cutter-shaft. Fig. 5, Plate 2, is a sectional view of the different joints.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to the cutting, grinding, and polishing of wood, ivory, stone, and other substances by means of a suitable tool applied on one end of a rotary shaft or spindle, which is allowed to receive universal movement, and which is guided and controlled by the hands, as will be hereinafter explained.

The following description of my invention will enable others skilled in the art to understand it.

In the accompanying drawing, A represents a vertical standard,which may be secured down firmly upon a bench or table or upon a floor, and which has a socket in its upper end. Into the upper end of the standard A is loosely fitted the cylindrical stem a of an eye-bearing or journal-box, a, through which passes horizontally a short rock-shaft, b, carrying on one end a grooved pulley or balance-wheel, O, and on the other end a bearing, 13. Through the bearing B passes a rod or lever, D, which may be secured fast to the bearing B by means of a set-screw, b, and which carries on one end a weight, E, made adjustable by means of a setscrew, 6. The rod or lever D is allowed to receive a vertical vibrating motion, and it is adjustable endwise through its bearing B, for a purpose hereinafter explained. That end of the rod D which is opposite the weight E has a socket in it, which receives loosely the stem (1 of a bearing-block, (I, through which block passes a short shaft, 0. This shaft 0 passes through a tubular bearing, h, to which .it is connected by a set-screw, f, and carries a twin pulley, E. The tubular bearin g h receives into it a rod, G, to which it is connected by a set-screw and annular groove, thus allowing the rod and its bearing a free swiveling motion. The lower end of the rod G is received into a tube, H, and is secured thereto by set screw H. Through the lower end of the tube H passes a shaft in carrying on one end a grooved pulley, j, and on the other end a beveled spur-wheel, l. The shaft In also receives on it loosely one end of a rectangular bearin g, F, the other end of which affords a bearing for one end of a hollow handle, J, through which passes a cutter-shaft or spindle, n, on which is a fixed collar, 1*, and a bevel-wheel, l, the latter engaging with the bevel-wheel l on shaft m, as shown in Figs. 1 and 5. 0n the exposed end of the shaft or spindle n a cutter, p, or a spherical burr, p, or any other desired tool may be secured by a screw or otherwise, and for the purpose of facilitating the manipulation of the tool a device represented in Fig.

4 is used. This device consists of a tube, 8, which is fitted tightly on the end of the tubular handle J, and to which is secured a rectangular arm, 0, that affords a handle beyond the end of the cutter-shaft 02., thus allowing two hands to be used for controlling the tool. Rotary motion is applied to the wheel 0 either by manual or other power, and is transmitted to the shaft or spindle a through the medium of bells gi and spur-wheels I l, and while the shaft or spindle n is rotating it can be moved by hand in any direction desired, as its connections allow it to receive universal play.

To recapitulate, the shaft a allows the rod or lever l) to receive a vertical and horizontal reciprocating motion. The shaft 0 allows the rod G to receive similar motions, and the shaft on and frame F allow the handle J and toolshaft n to receive a universal motion. By these means the tool can be moved in any direction at the same .time that it receives a regular rotary motion from the driving-wheel O. It is important to keep whatever tool it is desired to employ balanced, so that the attendant will not be required to exercise any labor in moving such tool, other than that which is necessary to depress it upon the work. This is done by the weight E on the rodD-, which weight is adjusted nearer to or further from the bearing 1), according; to the weight of the tool used, so as to keep the tool balanced. The rod D is adjustable in the direction of its length, for the purpose of allowing the tool to move over a greater or less space, as may be desired.

It will be seen from the above description with what facility and ease cutting, grinding, or polishing tools can be employed in executing the various kinds of work for which such tools are designed.

Having described my invention, what I claim as new, and desire to secure by Letters Patent is- 1. The cuttercarrying shaft or spindle n. and its hollow handle J suspended by universal joints from a loaded vibrating rod, D, substantially as described.

2. The bevel-wheels Z I applied to shafts m n, in combination with the bearing-frame F, the jointed tube H, swiveling rod G, and jointed bearing h, all suspended from one end of an adjustable loaded vibrating rod, D, substantially as described.

3. The combination of the adjustable weight E, adjustable rod D, and a rotary tool-shaft n, which is suspended from said rod and allowed to receive universal motion, substantially as described.

4. The auxiliary holder 8 0 applied on the handle J, substantially as and for the purpose described.

' ROSWELL T. SMITH.

Witnesses:

CHAS. P. BELL, JERRY SULLIVAN. 

